Plymouth Engine Build Date Codes









Plymouth Engine Build Date Codes

1960 Block Stamp: PR38620
PR Year, Block	38 Cubic inch	6 Month	20 Day

1960-67 Block stamp: R411006
R Year	41 Cubic inch	10 Month	06 Day

Build Date
Code	Year	Code	year
P	1960	V	1964
R	1961	A	1965
S	1962	B	1966
T	1963	C	1967

Code	Month	Code	Month
1	January	7	July
2	February	8	August
3	March	9	September
4	April	10	October
5	May	11	November
6	June	12	December

1968-72 Block Stamp: FW44029001234
FW Plant	440 Cubic inch	2900 Build date code	1234 Engine number

1973 Block Stamp:
"A" Engine Family: JM440P40005678
JM Series, Plant	440P Cubic inch, Model	4000 Build date code	5678 Engine number
"B and G" Engine Family: J440P9-152
J Series	440P Cubic inch, Model	9-15 Build date	2 Build Shift

1974-75 Block Stamp:
"A" Engine Family: 4M440P45005678
4M Year, Plant	440P Cubic inch, Model	4500 Build date code	5678 Engine number
"B and G" Engine Family: 4W440P9-152
4W Year, Plant	440P Cubic inch, Model	9-15 Build date	2 Build Shift

Series, Plant codes: J= 1973 K= 1974 L= 1975 NM- Marysville M- Mound road plant T-Trenton plant W- Windsor plant	Build date code: 1970: start at 2895 thru 3259 1971: start at 3260 thru 3624	Build date code: 1972: start at 3625 thru 3990 1973: start at 3991 thru 4355	Model codes: HP- High Performance LC- Low compression P- Premium fuel R- Regular fuel S- Special engine

The engine build date code decoder reveals the plant, year, engine displacement, and month and day of manufacture.

Plymouth Engine Codes